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If the pH of a solution increases linearly, what happens to the H+ concentration?

a) Increases linearly
b) Decreases linearly
c) Increases exponentially
d) Decreases exponentially

2007-03-23 03:40:38 · 2 answers · asked by slow_math 1 in Science & Mathematics Geography

2 answers

D. as pH increases, H+ decreases and OH- increases, both Exponentially

2007-03-23 03:44:39 · answer #1 · answered by Doc E 5 · 0 0

pH = -log[H+]

So the H+ concentration is equal to 10^(-pH), meaning that as pH increases linearly, H+ concentration decreases exponentially:

if pH is 1, H+ is 10^(-1) or 1/10

if pH is 2, H+ is 10^(-2) or 1/100

if pH is 3, H+ is 10^(-3) or 1/1000

Clearly, H+ decreases as pH increases. It does not decrease linearly because 1/10 is not the same distance from 1/100 as 1/100 is from 1/1000.

2007-03-23 10:50:01 · answer #2 · answered by JaniesTiredShoes 3 · 0 0

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